Alright, let's work through 8211 times 9915 step by step
8211 × 9915 = 9915 × (8211)
+ 9915 × 1 what gives us 9915
+ 9915 × 10 that is equal 99150
+ 9915 × 200 producing 1983000
+ 9915 × 8000 that is equal 79320000

= 81412065
